Been to Alaska multiple times. Osterdam is a beautiful ship and had a great staff and crew last time we were on it.
Alaska is sooooo beautiful you wouldn't want to have a cabin with only a window. There is nothing as lovely as sailing by some of the most astounding visuals in the world on your balcony with a cup of coffee/tea or ??? My husband and I would sit out on the balcony and have breakfast almost everyday and enjoy the passing scenery, especially sailing through the Inside Passage. Truly unbelievable.
I think if you don't get at least a balcony cabin you will regret it.